package com.superteam.zzl.utils;

import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.GridView;
import android.widget.ListAdapter;
import android.widget.ListView;

import com.superteam.zzl.activity.MainActivity;

/**
 * Created by zhang on 2017/1/10.
 */

public class ListViewUtils {

    /**
     * 计算ListView的宽高
     * @param listView
     */
    public static void setListViewHeightBasedOnChildren(ListView listView) {

        // 获取ListView对应的Adapter

        ListAdapter listAdapter = listView.getAdapter();

        if (listAdapter == null) {

            return;

        }

        int totalHeight = 0;

        for (int i = 0; i < listAdapter.getCount(); i++) { // listAdapter.getCount()返回数据项的数目

            View listItem = listAdapter.getView(i, null, listView);

            listItem.measure(0, 0); // 计算子项View 的宽高

            totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总高度

        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();

        params.height = totalHeight
                + (listView.getDividerHeight() * (listAdapter.getCount() - 1));

        // listView.getDividerHeight()获取子项间分隔符占用的高度

        // params.height最后得到整个ListView完整显示需要的高度

        //Log.e("data",params.height+"======List");
        listView.setLayoutParams(params);
    }



    /**
     * 计算GridView宽高
     *
     * @param gridView
     */
    public static void calGridViewWidthAndHeigh(int numColumns, GridView gridView) {

        // 获取GridView对应的Adapter
        ListAdapter listAdapter = gridView.getAdapter();
        if (listAdapter == null) {
            return;
        }

        int totalHeight = 0;
        for (int i = 0, len = listAdapter.getCount(); i < len; i++) { // listAdapter.getCount()返回数据项的数目
            View listItem = listAdapter.getView(i, null, gridView);
            listItem.measure(0, 0); // 计算子项View 的宽高

            if ((i + 1) % numColumns == 0) {
                totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总高度
            }

            if ((i + 1) == len && (i + 1) % numColumns != 0) {
                totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总高度
            }
        }

        totalHeight += 40;

        ViewGroup.LayoutParams params = gridView.getLayoutParams();
        params.height = totalHeight;
        // listView.getDividerHeight()获取子项间分隔符占用的高度
        // params.height最后得到整个ListView完整显示需要的高度
        //Log.e("data",params.height+"======Grid");

        gridView.setLayoutParams(params);
    }

}
